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О применении компактных схем для уравнения колебаний в кусочно-однородных средах

О применении компактных схем для уравнения колебаний в кусочно-однородных средах

Abstract

The presented work is a continuation of series of articles devoted to the application of compact schemes with universal high-order accuracy approximation. These schemes are applied for the boundary value problems with discontinuous coefficients, which are used for modeling of interfaces between different media. The idea of the work is in further implementation of the technology, developed earlier for the parabolic and elliptic equations, to the boundary-value problems for the wave equation in compounded domains. High-order accuracy formulae for calculation of solutions in special nodes of a grid (such as domain corners, at intersections of several materials, etc.) are offered, which close the proposed highly accurate algorithm.

Работа является продолжением цикла статей по применению компактных схем с универсальной высокоточной аппроксимацией граничных условий на линиях раздела сред для решения краевых задач с разрывными коэффициентами и заключается в распространении технологии, разработанной ранее для параболических и эллиптических уравнений, на краевые задачи для уравнения колебаний в составных областях. Предлагаются формулы повышенной точности для вычисления решения в особых узлах сетки (в углах области, в точках сопряжения нескольких материалов и т.д.), замыкающие высокоточный алгоритм в целом.

Keywords

ОДНОСТОРОННЯЯ АППРОКСИМАЦИЯ ПОТОКА, МНОГОТОЧЕЧНЫЕ ГРАНИЧНЫЕ УСЛОВИЯ, КОМПАКТНАЯ СХЕМА, КУСОЧНО-ОДНОРОДНАЯ СРЕДА, НЕОДНОРОДНАЯ ОБЛАСТЬ, СХЕМА ВЫСОКОГО ПОРЯДКА ТОЧНОСТИ, АППРОКСИМАЦИЯ ГРАНИЧНЫХ УСЛОВИЙ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
bronze